LLY: Possible Injector Knock

southerndruthers

Mechanically Challenged
Jun 26, 2014
2
0
0
Georgia
Alright, guys. I know I'm new to the forum, but I need a little help, so I'm just going to jump right in and ask for some troubleshooting advice.

I have a 2005 GMC Sierra 4x4. I recently went into limp mode and eventually discovered that the root cause to the problem was the infamous connector on injector #2. Of course, before I realized it was the connector, I went out and had a new #2 injector put on (from the Pensacola guys), and after I drove it for about a day and a half, it went back into limp mode. A mechanic friend of mine picked the connector, and that problem seems to be remedied for now. However, since I've had the new injector, I've been noticing a knock that gets pronounced at around 35-45 mph. I didn't have this knock before I got the new injector, and after reading up on some similar problems from some other guys, it sounds to me like a definite injector knock considering the problems leading up to it.

My question is: Should I just put the old injector back on? Being that we discovered that the bad connector was the cause of the limp, I assume that the injector was never bad to being with. Or could it be that the pick-job didn't fully fix the problem, and I still have high resistance going to that injector? Or, is it something else?

Any advice you fellas can give me would be greatly appreciated. Thanks in advance.
 

southerndruthers

Mechanically Challenged
Jun 26, 2014
2
0
0
Georgia
I think I may try that before anything else. I just don't see how it could be anything other than an issue with that injector considering the timing of it all.
 

cdprayor

Farmtruckin
Dec 28, 2013
45
0
0
Let me know your outcome. Mine kinda did the same thing after p0201 code. Now it won't even start. Mechanic is gonna do a leak down test Monday. Hopefully just an injector